Improvement in spring bed-bottoms



I. BUSH.

Spring Bed-Bottoms,

. Patented Feb. 18,1873.

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i ivrrnn STA ES PATENT OFFICE.

ISAAC Bose, or INDIANOLA, IOWA, Assrenor. or ONE-HALF HIS RIGHT TOoHAnLEs MGKAY, or SAME PLACE.

IMPROVEMENT IN SPR' ING BED-BOTTO MS.

Specification forming part of Letters I'atent No. 135,885, datedFebruary 18, 1873.

To all whom it may concern:

Be it known that I, ISAAC Bnsn, of Indianola, in the county of WarrenandState of Iowa, have invented an Adjustable Spring Bed-Bottom, ofwhiclrthe following is a specitication:

The object of my invention is to provide a spring bed-bottom that willconform to the shape of the body, and that can be readily adjusted toelevate the head, and also to meet the unequal pressureon the sidesoccasioned by two persons of different weight. It consists in attachinggraduated blocks on the under side and head end, and in a sliding barcarrying coil-springs, all as hereinafter fully set forth. l

Figure let my drawing is a miniature perspective view illustrating themanner of constructing and operating my adjustable springbed. Y

A A represent a bedstead which may vary in form. B B is a strip ofboard, attached in a common way on the inside of the side rails tostrengthen the rails and-to support the bedbottom. 0 0 is a'movablecross-piece resting upon the supports B B. D D is a similar crosspiecepermanently attached to the bed-bottom,

and forms a part thereof. Its ends also rest on the supports B B. E is across-piece framed in the blocks a a on the under"sides and near theheadends of the pieces F F. F F are the longitudinal side pieces towhich coil-springs are attached. 1 2 3 4: 5 6 represent a series ofslats running crosswise, and secured and held npby the coil-springsattached to the pieces F F. Two flexible cords or straps are attached ina common way'to encircle the ends of the slats to keep them in positionand to make them cooperate in bearing up the person or persons on thebed. Each slat is allowed independent play to such an extent that. itwill alternately rise and sink to conform with the shape of the bodyresting thereon. a a are graduated blocks permanently attached to the Iunder sides and head ends of the side pieces F F, and afford a simplemeans of elevating the head and shoulders whenever desired. The movablecross-piece G (l is shown underneath the graduated block, and the headend of the bed-bottom elevated thereby. To lower it and make it level,simply slidethe crosspiece O (3 forward until it is free from the blocksa a. By a series of steps in the blocks,

Fig. 2 is a transverse section of the bed, and

illustrates the manner of adjusting the laterally-slidin g piece G G tomeet unequal pressures and to keep the bed even.

The coil-springs are attached to the sliding piece G at intervalscorresponding with the series of cross-slats 2 3 4 5 6, and pressagainst the slats and aid in holding them up. When two persons of equalweight occupy the bed the sliding piece G should be in the center.

For persons of unequal weight it should. be

moved toward the side occupied by the heaviest person. A complete andsimple means is thus provided for keeping the bed even and level. Ifasten the base of the coil-springs to the pieces F F and G, by means ofL- shaped staples, in such a manner that the end of the wire-coil willhook around one of the staples and clasp to it when there is any weightor pressure upon thespring to expand the coil.

The end of the wire at the apex of the spring is coiled around a screwand the screw driven into the slat; but I do not confine niyself to anyparticular mode of fastening the coilsprings.

Any common method of fastening may be adopted to accomplish the purposescontemplated by my invention.

I am aware that spring bed-bottoms with slats running lengthwise andalso crosswise have been made to rest upon coil-springs. 1 claim,however, that the mode of elevating the head and adjusting the bed forpersons of un equal weight is a new and valuable improvement.

Claim.

I claim as my invention- .In the construction of a spring-bed, the com-I bination of the graduated blocks a a and the sliding piece G carryinga series of coil-sprin gs, substantially as described, and for thepurposes

